We’re making multiple copies of the BE-4 to take us through our development campaign, along with a healthy amount of hardware spares to mitigate schedule and technical risks encountered along the way – – a “hardware rich” approach to development. To maintain a fast pace, we’ve elected over the past years to invest heavily in key machines, tooling and people for the production of BE-4 so we can control critical processes in-house.
We’ve also started testing the BE-4 preburner in our recently commissioned pressure-fed test cell. We’re developing the transient start sequence for the preburner, and we’re making good progress.
We’ll continue to keep you posted on our progress as this engine comes together.
Gradatim Ferociter!
Jeff Bezos